If it can be avoided, don't use a trip as a test bed for a new exciting accessory. This is particularly true for electrical system farkles. It's asking for trouble to install new auxiliary lights or perform other mission-critical electrical modifications right before a rally. This leaves no time to thoroughly exercise the system for proper behavior before having to depend on them during a long night ride.

And don't forget, even the best mechanic can make a mistake. Try and avoid picking up your motorcycle and heading out directly on
a 10,000 mile trip. A trip is also not the best time to try out that new rainsuit, helmet or packing
technique!